Dirigible lamp



w. H. SPENCER.

DIRIGIBLE LAMP.

APPLICATJON FILED !UNE 19, 1917. I

34L681 Patenta& June 1, 1920,

5 www/to@ WILLIAM. H. SPENER, OF NEW YORK, N. Y., ASSIGNOR TO GEORGE FRINK SPENCER,

OF NEW YORK, N. Y.

DIRIGIBLE LAME'.

Specfication of Letters Patent.

Patented June 1, 1920.

To all whom it may concrn:

Be it known that I, VVILLIAM H. SPENonn,

a citizen of the United States, and a resident of the borough of Manhattan, city, county, and State of New York, have inventecl certain new and useful Improvements in Dirigible Lamps, of which the following is a full and clear specification.

This invention relates more especially to bracket lamps and has for its primary-object to provide a simplified construction embodying a minimum number of parts disposed in an improved manner. My' invention contemplates a Construction in which the lamp socket is journaled directly upon an arm or support, preferably by a 90 degree bend which forms a part of thelamp socket body. In the preferred embodiment of my invention shown on the drawings, the lamp socket is journaled on the outer end of a horizontal bracket arm so as to Swing in a horizontal plane, it being then made possible to project the light in any desired direction within a vertical plane from any position the lamp may be in, by means of a shade or refiector journaled on said lamp socket.

In the drawings,-

Figure 1 isa side elevation of the preferred embodiment of my invention, parts being broken away;

Fig. 2 is a fragmentary vertical section of the same on an enlarged scale, parts being broken away, and parts shown in side elevation;

Fig. 3 is a cross section of the journal 3.

Referring more particularly to the drawings, a bracket arm 1 is shown in the preferred embodiment of my invention to project horizontally from the side wall of the room, for example one of the rooms of a hospital. The outer end of said bracket arm or support carries a ball 2 provided with a laterally or upwardly projecting nib or journal 3, and an annular bearing surface extending around said nib or journal. Said nib or journal 3 is provided with a peripheral groove 4, into which projects a worm or screw 5 which is threaded into the bearing portion 6 of the reduced branch 7 of a 90 bend 7 which is 'also provided with an enlarged branch '7 which carries a lamp socket 8. Said lamp socket is thereby journaled on the outer end of ,the bracket arm 1, the screw 5 being limited in its movement in the groove 4, so as to limit the horizontal swinging movement of the lamp 9 which is mounted in the socket 8. It will be seen therefore that in this embodiment of my invention, the lamp socket' is adapted with a limited movement to swing in a horizontal plane. Journaled upon the outer end of the lamp socket is a shade or reflector lO which in its different positions thereon is adapted to project a light 'rom the lamp in any direction within a vertical plane from any position of the lamp socket within its horizontal plane of movement. In Fig. 1, a lamp socket is shown in a position to illuminate the room in the usual manner.

Obviously, both the socket and the shade or refiector may be made to assume various other relative positions other than that shown. The advantages the use of my invention are those resulting from its Simplicity, the small compass of the movements of the relatively adjustable parts and the facility with which these adjusting movements may be made.

l'claim:

1. The combination with a bracket arm provided with a cylindrical nib or journal and an annular hearing surface extending around said nib or ournal, a lamp carrying fitting having a reduced branch freely journaled on said nib or journal and hearing against said annular hearing surface, an enlarged branch on said fitting, a lamp socket mounted in said enlarged branch, a reflector mounted on said lamp socket to Swing about the axis thereof, and means interengaging between said cylindrical nib or ourr nal and said reduced branch for constraining said enlarged branch -to a free swinging movement in a fixed plane. j

2. In a bracket lamp, a bracket arm provided with a journaling portion, a fitting comprising angularly disposed branches, one of said branches being provided with a journaling portion having journaling engagement with the journaling portion of said bracket the other branch of said fitting, said journaling portions being respectively provide with a peripheral groove and a projection slidably engaging the walls of said peripheral groove for constraining said fitting to a given plane of movement.

WILLIAM H. SPENCER.

to be derived fromarm, and a lamp mounted on 

